Process of treating starch.



UNITED STA'IES PATENT OFFICE. FREDERICK DRITTLER, OF RUTHERFORD, NEW JERSEY, ASSIGNOR TO- THE ARABOL MANUFACTURING COMPANY, OF NEW YORK, N. Y., A CORPO- R TION O NEW YORK.

PROCESS -OF TREATING STARCH- No. 847,985. 1 Specification of Letters Patent. Patented March 19, 1907. Original application filed March 9,1906,Sa1ia1No. 305,154. Diviita and this application tiei nglia 23,1906. Serial No. 381.687-

To all whom it may concern: tive, which is usually selected to bevolatile' at Be it known that I, FREDERICK DRITTLER, amoderate temperature, may then, if desired, 5 5 a former subjectfof the Emperor of Germany, be removed from the dry powder by evapo- I having declared myintention to become a ration, condensed, and use over agaln. 5 citizen of the United States, a. resident of' alkaline starch is thus roduced which is Rutherford, in the county of Bergen" and capable of swelling in col water.

State of New Jersey, have invented certain .To prepare a neutral starch of similar propto new and useful Improvements in the Process erties, an equivalent amount-of an acidprefof Treating Starch, of which the following is erably some organic acid, as acetic, citric, a specification. tartaric, oxalic, &c., or watery solutlons My present invention forms a division of thereof -is added aboiit onehour after the admy copending application, Serial No. 305,154, dition of the caustic alkalig, If it be desired filed March 9, 1906, for process of renderto remove the derivative, this is referably ing starch capable of swelling in cold water, done prior to the neutralization. perfectly. l5 and relates to the use of derivatives of the neutral starch capable of swelling in cold I hydrocarbons, as disclosed but not specificwateris thereby produced. I allyclaim'ed in said prior application. Instead of a'liquid acid I may use non-hy- My invention consists, essentially, in mixgroscopic acids in-the crystalline or powdered ing dry powdered commercial starch with a condition in equivalent amounts to neutralzo suitable quantity of a liquid-halogen SllbSI/I' ize the alkali used, the neutralization taking tution product or other derivative of a hy- "place upon the immersion in water. 7 drocarbon and then adding thereto a suitable The starch, whetherneutral or alkaline, 7 5

quantity of caustic alkali. I wish, however, bursts when it comes in Contact with water to include only such derivatives as are chem and readily swells in cold water up. to the ically" inactive with respect tostarch and at. proportion of about one to ten parts, by

ordinary temperatures are li uids of an oily wei ht, respectively, forming a viscous mass f nature and raotically insolu le in and nonsimilar to gum-tragacanth and suitable for miscible wit water. most purposes for which the said gum-tra- Among the various derivatives I have gacanth has been used and applied.

found such li uiols as carbon tetrachlorid, For some purposes the resence in the carbon bisulfi ,nitrobenzene, &c. to be s'atfinished starch-powder of the'hydrocarbon isfactory, particularly carbon tetrachlorid, derivatives is of advantage, and such because of its non-inflammability and comcases they may be left in the modified starch.

' par'ative inexpensiveness, or a mixture of this What I claim as new, and desire to. secure compound with'crude paraffin-oil of'the-speby Letters Patent of the United States, is

clfic gravity 0.865 in the proportion of one to 1. The herein-described ]process for render one by volume. P ing starch capable of swel ng in cold water: 0 In carry ngbout my process I take one hunconsisting .in first mixing the starch with a dred parts, y weight, of pulverized dry liquid derivative-of ahydrocarbomirisoluble starch, such as ordinary corn-starch, and in water; and then addin caustic alkali.

treat this with'approxim'ately eighty parts, 2. The herein-describe rocess for renderby weight, of a liquid derivative of a hydroing starch capable of swel 'ng in cold water, 9 5

carbon of the character specified or with sufconsisting in: first mixing the starch with a ficient volume thereof to make a semifiuid liquid derivative of a hydrocarbon, insoluble mass and then thoroughly mix the two by in water; then adding caustic alkali; and

StII'I'lIlg. After the starch .has been thor finally removing said derivative.

oughly mixed with such a li uid I add forty 32 The herein-described process for renderwe to fifty parts, by weight, (9f liquid caustic ing starch capable of swelling in cold water,

alkali, as caustic soda, at 30 Baum' for consisting in: first mixing the starch with a every one hundred parts starch contained in liquid derivative of a hydrocarbon, insoluble the mixture. The massuponbeingthoroughly in water; adding caustic alkali; removing a mix-edchanges almost instantaneously into a said derivative; and finally neutralizing sai i o 5 voluminous dry flufly powder. The derivaalkaline starch.

4. The herein-described process of rendering starch capable of swelling in cold water, consisting'inz first mixing the starch with a liquid-halogen substitution product of a, 'hydrocarbon, insoluble in water; and then adding caustic alkali.

5.- The herein-described process for rendering starch capable of swelling in cold water, consisting in: first mixing the starch with a liquid halogen substitution product of a hydrocarbon, insoluble in water; then adding caustic alkali; and finally removing said halogen substitution product.

6. The herein-described process for render- .ing starch capable of swelling in cold water,

ing starch-capable of swel 'ng in cold water,

consisting in: first mixing the starch with carbon tetrachlorid; and then adding caustic alkali.

8. The herein-described process for rendering starch capable of swelling in cold water, consisting in: first mixing the starch with carbon tetrachlorid; then adding caustic alkali; and finally removing said carbon tetrachlorid.

9. The herein-described process of rendering starch capable of swelling in cold water, consisting in: first mixing the starch with carbon tetraehlorid; then removing the said carbon tetrachlorid; and finally neutralizing said alkaline starch.

Signed at New York, in the county of New .York and State of New York, this 22d day of August, 1906.

FREDERICK DRITTLER.

Witnesses:

FREDK. F. SCHUETZ, G REED.

35 adding caustic alkali; 

